1. Vocational School of Mudurnu Süreyya Astarci, Bolu Abant İzzet Baysal University, Bolu, Turkey
2. Faculty of Forestry, Forest Industrial Engineering, Bartin University, Bartin, Turkey
3. Faculty of Forestry, Forest Industrial Engineering, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey
4. Faculty of Economics and Administrative Sciences, Department of Quantitative Methods, Bartin University, Bartin, Turkey
5. Faculty of Forestry, Forest Industrial Engineering, Karabuk University, Bartin, Turkey